Yes that is what I'm thinking too because the name Pyykko would be pronounced wrong a lot here in the states. So I think my great great grandmother chose Anderson to make it easier for Johan. I did find her ship records where she has Johan listed under Pyykko as well.
Thank you so much for this. I truly appreciate all the help you have done. It hasn't been an easy search for me but you definitely pushed me in the right path. I hope you had a great Easter.